The beginning of what looks to be a pretty interesting series on the Game Boy. The video does an excellent job of explaining how things work right down to the CPU registers. It also gives a nice explanation and comparison of assembly programming. For a somewhat difficult subject I thought they did a fantastic job of explaining the basics. A very well done video.
If you are a native French speaker you might be interested in their French version at https://www.youtube.com/watch?v=XPGOh1_cVG8